C#使用xmlDocument类操作非标准的xml文件，应该先引用它的命名空间
如：
<Workbook xmlns:html="urn:schemas-microsoft-com:office:spreadsheet">
<ExcelWorkbook xmlns="urn:schemas-microsoft-com:office:excel">
<WindowHeight>7995</WindowHeight>
<WindowWidth>14955</WindowWidth>
</ExcelWorkbook>
</Workbook>
XmlDocument xmlDoc = new XmlDocument();
xml.Load(@"D:\MyDocuments\VSS\Bonus.root\Bonus\TestDB\YearBonus.xml");
XmlNamespaceManager nsmgr = new XmlNamespaceManager(xml.NameTable);
nsmgr.AddNamespace("ab", "urn:schemas-microsoft-com:office:spreadsheet");//引用命名空间
XmlNode root = xml.DocumentElement;
XmlNode v1 = root.SelectSingleNode("//ab:Workbook/ab:ExcelWorkbook/ab:WindowHeight", nsmgr)//按照顺序读取节点
SMIL类型的文件
<smil xmlns="http://www.w3.org/2000/SMIL20/CR/Language"> <head> <meta name="title" content="smil"/> <layout> <root-layout width="100%" height="100%"/> <region /> <region /> </layout> </head> <body> <par> <text src="0d9e3743-9909-45e6-8d62-e28ea29e8e35.txt" region="Text"/> </par> <par> <img src="26495120-e3fa-47b3-b64b-a66a138da120.gif" region="Image"/> </par> </body> </smil>
XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load(sFilePath); XmlNamespaceManager nsmgr = new XmlNamespaceManager(xmlDoc.NameTable); nsmgr.AddNamespace("default", "http://www.w3.org/2000/SMIL20/CR/Language");//引用命名空间 XmlNode mNode = xmlDoc.SelectSingleNode("//default:smil/default:body", nsmgr);//按照顺序读取 for (int i = 0; i < mNode.ChildNodes.Count; i++) { Response.Write(mNode.ChildNodes[i].FirstChild.Attributes["region"].Value); }